Antihydrogen annihilation reconstruction with the ALPHA silicon detector

被引：23

作者：

Andresen, G. B. ^{[1
]}

Ashkezari, M. D. ^{[2
]}

Bertsche, W. ^{[3
]}

Bowe, P. D. ^{[1
]}

Butler, E. ^{[4
]}

Cesar, C. L. ^{[5
]}

Chapman, S. ^{[6
]}

Charlton, M. ^{[3
]}

Deller, A. ^{[3
]}

Eriksson, S. ^{[3
]}

Fajans, J. ^{[6
]}

Friesen, T. ^{[7
]}

Fujiwara, M. C. ^{[7
,8
]}

Gill, D. R. ^{[8
]}

Gutierrez, A. ^{[9
]}

Hangst, J. S. ^{[1
]}

Hardy, W. N. ^{[9
]}

Hayden, M. E. ^{[2
]}

Hayano, R. S. ^{[10
]}

Humphries, A. J. ^{[3
]}

Hydomako, R.

Jonsell, S. ^{[3
,11
]}

Jorgensen, L. V. ^{[3
]}

Kurchaninov, L. ^{[8
]}

Madsen, N. ^{[3
]}

Menary, S. ^{[12
]}

Nolan, P. ^{[13
]}

Olchanski, K. ^{[8
]}

Olin, A. ^{[8
]}

Povilus, A. ^{[6
]}

Pusa, P. ^{[13
]}

Sarid, E. ^{[14
]}

el Nasr, S. Seif ^{[9
]}

Silveira, D. M.

So, C.

Storey, J. W. ^{[8
]}

Thompson, R. I. ^{[7
]}

van der Werf, D. P. ^{[3
]}

Yamazaki, Y. ^{[15
,16
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[3] Swansea Univ, Dept Phys, Swansea SA2 8PP, W Glam, Wales

[4] CERN, European Lab Particle Phys, CH-1211 Geneva 23, Switzerland

[5] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ, Brazil

[6] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[7] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada

[8] TRIUMF, Vancouver, BC V6T 2A3, Canada

[9] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada

[10] Univ Tokyo, Dept Phys, Tokyo 1130033, Japan

[11] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[12] York Univ, Dept Phys & Astron, Toronto, ON M3J 1P3, Canada

[13] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England

[14] NRCN Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel

[15] RIKEN, Atom Phys Lab, Saitama 3510198, Japan

[16] Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1538902, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2012年 / 684卷

基金：

英国工程与自然科学研究理事会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

Antihydrogen; Antimatter; Event reconstruction; Vertexing detector; Cosmic ray background suppression; PHYSICS;

D O I：

10.1016/j.nima.2012.04.082

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The ALPHA experiment has succeeded in trapping antihydrogen, a major milestone on the road to spectroscopic comparisons of antihydrogen with hydrogen. An annihilation vertex detector, which determines the time and position of antiproton annihilations, has been central to this achievement. This detector, an array of double-sided silicon microstrip detector modules arranged in three concentric cylindrical tiers, is sensitive to the passage of charged particles resulting from antiproton annihilation. This article describes the method used to reconstruct the annihilation location and to distinguish the annihilation signal from the cosmic ray background. Recent experimental results using this detector are outlined. (C) 2012 Published by Elsevier B.V.

引用

页码：73 / 81

页数：9

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